Glossaryyolk sac
a large, yellow sack on an alevins' body that holds all the food it needs to grow. When the yolk sac is gone, the alevin is mature enough to leave the redd to look for it's own food.
a large, yellow sack on an alevins' body that holds all the food it needs to grow. When the yolk sac is gone, the alevin is mature enough to leave the redd to look for it's own food.